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Grandstream's award-wining BudgeTone-100 series of SIP phones are innovative IP
telephones that offer a rich set of functionality and superb sound quality at ultraaffordable price. They are fully compatible with SIP industry standard and can
interoperate with many other SIP compliant devices and software on the market.
Support NAT traversal using IETF STUN and Symmetric RTP.
Advanced Digital Signal Processing (DSP) technology to ensure superior hifidelity audio quality, interoperable with various 3rd-party SIP end user device, Proxy/Registrar/Server and Gateway products.
Advanced and patent pending adaptive jitter buffer control, packet delay and loss concealment technology.
Support popular codecs including G711 (a-law and u-law), G722, G.723.1 (5.3K/6.3K), G.726 (40K/32K/24K/16K), G.728, G.729A/B and iLBC. Dynamic negotiation of codec and voice payload length.
Support standard voice features such as Caller ID Display or Block, Call Waiting, Call Hold, Call Transfer, Do-Not-Disturb, Flash, Call Forwarding, in-band and out-of-band DTMF(RFC2833), SIP INFO, Dial Plans, Off-Hook Auto Dial, Auto Answer, Early Dial and Speed Dial, etc.
Full duplex hands-free speakerphone, redial, call log, volume control, voice mail with indicator, downloadable ring tone, etc.
Support Silence Suppression, VAD (Voice Activity Detection), CNG (Comfort Noise Generation), Line Echo Cancellation (G.168) and AGC (Automatic Gain Control).
Support DIGEST authentication and encryption using MD5 and MD5-sess).
Provide easy configuration through manual operation (phone keypad), Web interface or automated provisioning via central configuration through secure TFTP file for mass deployment.
Support for Layer 2 (802.1Q VLAN, 802.1p) and Layer 3 QoS (ToS, DiffServ, MPLS)
NAT friendly remote software upgrade capability (via TFTP) even from behind firewall/NATs.
Support DNS SRV Look up and SIP Server Fail Over (pending).
